(单选题)

What does the passage mainly talk about?

A.The discovery of the expanding universe theory.

B.The differences between two universe theories.

C.Scientists’ unwillingness to abandon a widely accepted theory.

D.Scientists’ doubts about the theory that the universe is expanding.

参考答案：C

参考解析：

主旨大意题。根据最后一段最后一句“When Hubble’s study of nearby galaxies showed that the universe was in fact expanding, Einstein regretted modifying his elegant theory and viewed the cosmological constant term as his ‘greatest mistake’”可知，当哈勃对附近星系的研究表明宇宙世界上是在膨胀中的时候，爱因斯坦遗憾地修改了他优雅的理论并认为宇宙常数是他最伟大的错误。因此，文中不断强调宇宙膨胀理论本可以更早被发现，但只是因为旧有的观念太牢固，人们不愿意接受新的观念而导致了这一发现的延后。爱因斯坦在最后也不情愿地放弃了既有理论。所以短文主要是关于科学家不愿意放弃一个被广泛接受的理论。故选C。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语